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Oakden inquiry hitting 'brick walls'

The woman who blew the whistle on the abuse of residents at Adelaide's Oakden nursing home says an investigation of the facility is coming up against the same "brick walls" she did to getting information.

Barbara Spriggs has been named senior South Australian of the year for her work in lifting the lid on the scandal-plagued facility after she realised her husband was being mistreated.

She says she struggled to get information about her husband's care and it seems Independent Commissioner Against Corruption Bruce Lander is coming up against the same obstacles.

"Bruce Lander is coming up against the same brick walls that I came up against," Ms Spriggs told ABC radio on Tuesday.

"I feel for him that he can't do his job as quickly as he would like to."

On Monday, Mr Lander told a parliamentary committee that his investigation won't be finished before the end of the year and he may not be able to deliver his findings before the next state election in March.

"I have issued 13 summonses. I have received more than 37,000 documents comprising 300,000 pages," Mr Lander told the committee.

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"Given the large volume of evidence, I will not be in a position to complete my investigation this year.

"That is unfortunate, but I will not rush the investigation."

The commissioner will decide if the treatment of residents at Oakden amounted to maladministration.

He will focus on what information was known by people in authority, from local management to government ministers, to determine if they were aware of the poor conditions and care at the facility.

The state government closed the home earlier this year after a report exposed failures in clinical governance, incidents of rough handling of patients, excessive use of restraints and a high level of injuries.

It also uncovered conflict between staff and a questionable use medication, including one instance where a patient was given 10 times the correct dose of an antipsychotic drug.